The virtual office is now a dedicated page (nav: Office) with an HTML5
Canvas rendering animated pixel-art characters. Each agent is drawn as
a pixel person with deterministic skin/shirt colors, walking legs, and
a bobbing head when active. Idle agents wander randomly near their desk.
Active agents show a green dot, thinking agents show a question mark.
Departments are labeled zones with desks and monitors. Removed the old
sidebar component entirely.